Sash-balance



BEAN-B, SASH BALANCE 10.536,452. 'PatentedMaL 26,1895. f

NITnD STATES PATENT GFFICE.

JOSEPH HENRY BANE, OF BARRE, MASSACHUSETTS.

sAsH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 536,452, dated March 26, 1895.

Application iled August 28, '1.894- Sverial No. 521,502. (No model.)

.To all whom, it may concern:

Beit known that 1, JOSEPH HENRY BANE, of Barre, in the county of Worcester and State of Massachusetts, have invented a new and Improved Sash-Balance, of which the following is a full, clear, and exact description.

My invention relates to an improvement in sash balances, and it has forits object to provide a balance capable of application to any window whether it be an old or a new one; and a further object of the invention is to so construct the balance that it will not be interfered with inthe slightest degree by any warping of the material ot' which the window frame or sash may be constructed.

Another object of the invention is to provide a balance for window sashes which will be controlled by a brake, and whereby the window may be raised and lowered as conveniently as if the old balance was employed,

and furthermore wherein the locking device will be at one side of the sash and roller bearings located at the opposite side.

The invention consists in the novel construction and combination ot the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specication, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a partial side elevation and partial sectional view ot' a window sash and window frame, the balance being in section. Fig. 2 is a horizontal section taken substantially on the line 2-2 of Fig. 1. Fig. 3 is a similarA section taken on the line 3-3 of Fig. 1; and Fig. 4 is an enlarged vertical section through that portion of the balance provided with a brake, illustrating the construction and location of the/said brake.

In carrying out the invention the sash A is made to travel in the usual grooves or runways in the window frame B. Upon one side of the sash a rack 10 is secured in any suitable or approved manner, extending preferably froln the top to the bottom ot' the sash, and the said rack is adapted to engage with a pinion 11, located in a box 12, the latter being introducedinto the window frame B in `bottoni of the sash.

the runway thereof. The pinion extends out beyond the front plate ot' the box through an opening 13, and the said pinion is loosely mounted upon a spindle 14, journaled in the box, as shown in Figs. 2 and 4.Y Upon the said spindle adjacent to the pinion a ratchet wheel 15, is securely mounted,'and an enlarged or drum surface 16 is likewise formed on the spindle. The ratchet wheel l5 is constantly engaged by a spring-pressed dog 17, pivoted upon the pinion, as shown in Figs. 1 and 4; and the drum or enlarged surface 16 of the spindle is constantly engaged by a brake shoe 18, which shoe is carried byv a spring 19, the spring being attached to an arin 20, pivoted at one end in the box 12, the opposite or free end ot' the arm being controlled by a regulating screw 21, whereby upon ma*- nipulating the screw 21 thc brake shoe may be made to bear with greater or less power on the spindle.

In operation, when the window is raised, the pinion will turn loosely upon its spindle in engagement with the rack thus enabling the window to be carried upward with theAV least possible resistance and effort. The moment that the window is released from upward pressure the dog acts upon the ratchet wheel, virtually locking the pinion of the spindle 14, and the brake shoe 18 will act on the spindle to prevent it from turning.` Consequently the window sash will remain in the position in which it was placed. When the window sash is to be lowered it is simply drawn downward,

'and the resistance of the brake upon the spindle will be overcome, and when the window sash is released the brake will continue to act to hold the sash stationary.

In the opposite side of the window sash'to that carrying the rack 10 a box 22 is inserted, one preferably at the top and the other at the Each box is provided with an opening23 in its face through which a friction roller 24 extends. These friction rollers engage constantly with the run-way of the window frame, and are carried each by a spring 25 secured at one of its ends to a point within the box. Preferably the rollers are mounted in abituroated bearing 26, provided with lugs at the back, between which the upper end of the spring 25 is secured,the lower end of the spring being secured in like manner to a block 27 pivoted to ears28 located upon the inner front face of the boX, while the degree to which the spring may be ilexed is controlled by an adjusting block 29, en gaging with the spring between its upper and its lower bearin gs, the adjusting block being controlled by a set screw 30, passed throughl the box from the outside. rlhus it will be ob served that the rollers constantly bear against the window frame with predetermined pressure, and that the window sash through their assistance is materially aided in its upward and its downward movement.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A sash balance, comprising a spindle, a pinion loosely mounted on the spindle and adapted to engage a rack on a sash, a pawl and ratchet connection between the pinion and spindle, and a brake engaging the said spindle, substantially as described.

2. In a sash balance, the combination with a spindle, of a pinion loose on the spindle and adapted to engage a rack, a ratchet wheel secured to the spindle, a dog carried by the pinion and engaging the ratchet wheel, and a spring pressed brake engaging the spindle, substantially as described.

3. In a sash balance, the combination with a spindle, a pinion loose on the spindle adapted to engage a rack, and a pawl and ratchet connection between the pinion and spindle, of an adjustable arm, a spring carried by the arm and a brake shoe carried by the spring and engaging the spindle, substantially as described.

4. A sash balance, comprising a box having an opening in one side, a spindle journaled in the box, a pinion loose on the spindle, a ratchet secured to the spindle, a pawl on the pinion and engaging the ratchet, an arm pivoted to the box, a spring secured to the arm, a brake shoe on the free end of the spring, and a screw secured to the free end of the arm and working in a threaded openingin the box, substantially as described.

JOSEPH HENRY BANE.

VVitnesess:

GEORGE A. BROWN, JAMES B. COLBY. 

